000 00244nam a2200109Ia 4500
008 160710s1978 xx 000 0 und d
100 _aGUPTA, B D
245 _aMATHEMATICAL PHYSICS
260 _bVIKAS
_c1978
300 _a1238
942 _2ddc
_cB
999 _c43817
_d43817